Reference for Sotah 4:28
אמר ריש לקיש מה לשון קינוי דבר המטיל קנאה בינה לבין אחרים אלמא קסבר קינוי על פי עצמו וכולי עלמא לא ידעי דקני לה ואמרי מאי דקמא דקא בדלה ואתו למיעבד קנאה בהדה
A matter which causes hatred [Kin'ah] between her and others. Consequently he holds that the warning can be on [the husband's] personal testimony; and since not everybody knows that he gave her a warning and they say: 'What has happened that she holds herself aloof?' they will proceed to cause hatred against her. R. Jemar b. Shelemia said in the name of Abaye: [Kinnui means] a matter which causes hatred between husband and wife. Consequently he holds that the warning must be on the testimony of two witnesses and everybody is aware that he gave her a warning,<span class="x" onmousemove="('comment',' Since the witnesses are likely to talk of it to others. ');"><sup>24</sup></span>